Spring bolt



Patented Apr. 30, 1929.

UNITED STATES PATENT OFFICE.

FORREST T. ELLIS AND WALLACE E. W'ILBER, OF DETROIT, MICHIGN, ASSIGNORS TO GENERAL MOTORS CORORATION, OF DETROIT, MICHGAN, .A CORPORATION OF DELAWARE.

SPRING BOLT.

Application filed May 2, 1925.

The object oli this invention is to provide a construction of spring bolt which may be made ot' stock material with very little machining and yet will connect the parte with which it cooperates in a very satisfactory manner. Thus we have used for the body ot our bolt a short piece of bar metal and have provided it with a removable head. this head preventing;l Withdrawal of the bolt in one direction and also holding' it against rotation. The other ond ot the bolt is provided with the usual locking nut and the bolt is preferably drilled to serve as a reservoir for lubricant.

The preferred forni of our invention is shown on the drawing where Figure l is a plan vien7 with partsin section shoiviifigI our improved spring' bolt in operative relation; and

Figure 2 is a view showing the parte in process of being' assembled.

le have indicated at 2 a spring bolt Wh ich is prefere-bhT formed of a length of round bar stock. This bolt serves as a pivotal connection between the eye formed on the end of a leat spring; and shown at 4t and the vehicle traine, partot which shown at (3. In the claims We have referred to the member 6 as a spring; suspension part for we do not Wish. `to limit ourselves to 'the particular type oit spring suspension disclosed in which the spring' is directljiT connected to the vehicle traine. Nor indeed do we wish to exclude :troni the scope of our claims a construction in which the bolt may be looked to the spring instead of to the traine part.

This bolt is threaded at one ond and at the other is provided with key-'ways or notches 8. A removable key l0 is adopted to straddle the bolt and engage the notches 8 preventing endwise separation of the bolt Q from the spring suspension part 6 in one direction. The customary mit 12 engages the other end oi. the bolt and prevents endivise separation of the bolt and part in the other direction.

Serial No. 27,521.

In order to prevent rotation ot the bolt we have provided the key l0 with a pro tuberance ll which is adapted to engage e key-Way 16 formed in a flange 18 serving to snugly receive the lrey l0.

The bolt E2. is preferably drilled as at 2() to forni a reservoir 'tor oil which Lt'eeds to the rubbing surfaces 'through the duct 22. The outer end of the drilled.openingl is provided with an oil cup shown at 24.

W'liile we have shown our invention ap- 5 plied to bolts used in connection with vehicle springs it is to he understood that it is not limited to use in this particular l'ield but is rapable oi application in many analogous relations of parte.

le cla-iin: i

l. The combination ot ay support, a headless bolt adapted for mounting in the support and provided at one end with notches in its sides, a retainer with. spaced arms tor straddlingr the bolt and seating in the notches, a member on the support to secure the retainer against nf'ithdraival from its seat in the notches, and means `t'or securing the bolt and retainer in place and preventing their axial movement.

2. The combination ot a support, a headless bolt adapted for mounting in the support and provided at one end with notches in its sides. :l retainer with spaced arms for straddling t-he boltand seating in the notches, a. member on the support to secure the retainer against withdrawal from its seat in the notches. means ttor securing the bolt and retainer in place and preventing their axial and 80 rotary movement. y

ln testimony whereof We affix our signatures.

FORREST T. ELLTS. WALLACE E. WILBER. 

